链接: https://codeforces.com/contest/1238/problem/C 题意: You are playing a game where your character should overcome different obstacles. The current problem is to come down from a cliff. The cliff has height h, and there is a moving platform on each he…

https://codeforces.com/contest/1238/problem/C 题意:下台阶的时候只有一种方式,拉动当前台阶x的 level,然后当前的台阶关闭,调到下边的台阶x-1,如果台阶x-1是打开的,那么会使他关闭,那么只能到达x-1下面打开的台阶y, 然后判断落差是否大于2,如果大于二的话,只能用一个magic使x-2的台阶打开,然后依次判断. 题解:只要判断x-1台阶和x-1下边的台阶是否相邻,如果相邻的话,直接跳到x-2.否则要用一个magic,并跳到x-1. AC代码…

题目大意: 有一个墙,高度为h,在每一个高度处都有一个踏板,有的踏板是隐藏着的,有的是伸出来的,小人站在h高度处(题目保证h高度处的踏板一定是伸出来的),这个小人每站到一个踏板上,就可以点一个开关,将他所在的踏板收回,并将下一个高度上的踏板改变状态.小人只能最多落下两层楼,如果从高度为x处落到高度为x-3处那就会摔的稀碎,当然你肯定不想让他摔死是不是,要是不想摔死就充钱!每充一块钱就能指定一个踏板并改变他的状态.现在问你最少充多少钱能不让小人摔死. 做法:贪心,从第一个挡板开始往下跳,如果下面一…

传送门 题目别看错了,好像挺多人都读错了... 然后显然可以贪心,只有在需要用 $\text{magic crystals}$ 的时候才用 那么直接模拟即可 如果初始相邻两个突出的平台高度不连续那么我们显然可以直接从上面一步步操作到达下面的平台的上面一个位置 此时考虑如果我们直接操作,那么下面那个平台(设为 $x$)就会缩起来,然后就会掉到更下面的平台(设为 $y$) 如果当前和更下面的平台 $y$ 高度超过 $2$ 了,那么为了不摔死只能用一次 $\text{magic crystals}$…

目录 Contest Info Solutions A. Prime Subtraction B. Kill 'Em All C. Standard Free2play D. AB-string E. Keyboard Purchase F. The Maximum Subtree Contest Info Practice Link Solved A B C D E F G 6/7 O O O O Ø Ø - O 在比赛中通过 Ø 赛后通过 ! 尝试了但是失败了 - 没有尝试 Solution…

传送门 A. Prime Subtraction 判断一下是否相差为\(1\)即可. B. Kill 'Em All 随便搞搞. C. Standard Free2play 题意: 现在有一个高度为\(h\)的悬崖,每一层有平台,但可能是隐藏状态. 高度为\(h\)的那层平台一定是在外面的,假设当前高度为\(x\),那么每次可以改变\(x\)和\(x-1\)层平台的状态. 规定一个人若从\(x\)掉到\(x-1\)或者\(x-2\)都没事,否则就出事了. 问最少改变多少平台的状态,能够使在\(h…

A. Prime Subtractiontime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given two integers x and y (it is guaranteed that x>y). You may choose any prime integer p and subtract it any number of…

慢慢来. 题目册 题目 A B C D E F G 状态 √ √ √ √ × ∅ ∅ //√,×,∅ 想法 A. Prime Subtraction res tp A 题意:给定\(x,y(x>y)\),问能否将\(x-y\)拆成任意多个质数之和 1.任意大于\(1\)的整数\(k\)都可以用\(2\)与\(3\)的线性表示 证: 若\(k\)是偶数,显然: 若\(k\)是奇数,则\(k\)可以表示成\(k = 3 + 2*k'\),显然: 毕. #include<bits/stdc++.h&…

 cf之路,1,Codeforces Round #345 (Div. 2) ps:昨天第一次参加cf比赛,比赛之前为了熟悉下cf比赛题目的难度.所以做了round#345连试试水的深浅.....       其实这个应该是昨天就写完的,不过没时间了,就留到了今天.. 地址:http://codeforces.com/contest/651/problem/A A. Joysticks time limit per test 1 second memory limit per test 256…

CF memsql Start[c]UP 2.0 A A. Golden System time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Piegirl got bored with binary, decimal and other integer based counting systems. Recently she dis…

CF memsql Start[c]UP 2.0 B B. Distributed Join time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Piegirl was asked to implement two table join operation for distributed database system, minim…

E. Sign on Fence time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Bizon the Champion has recently finished painting his wood fence. The fence consists of a sequence of n panels of 1 meter w…

Freelancer's Dreams time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Mikhail the Freelancer dreams of two things: to become a cool programmer and to buy a flat in Moscow. To become a cool p…

Use Case In Salesforce, when you click on the standard ‘New’ button on a Related List to create a new record on the child object from the record currently in context in a Detail Page, after you click ‘Save’ and save the new record, it returns you to…

目录 . C++标准模版库(Standard Template Library STL) . C++ STL容器 . C++ STL 顺序性容器 . C++ STL 关联式容器 . C++ STL 容器适配器 . C++ STL算法 . C++ STL边界限制 1. C++标准模版库(STL) STL就是Standard Template Library,标准模板库.从根本上说 . STL是一些"容器"集合 . STL也是算法和其他一些组件的集合 . 这里的"容器"…

A. Case of the Zeros and Ones time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing…

D. Dima and Bacteria time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Dima took up the biology of bacteria, as a result of his experiments, he invented k types of bacteria. Overall, there a…

第一次参加CF的比赛,MSK19.30,四个小时的时差真心累,第一次CODE到这么夜-- 一开始做了A,C两题,后来做B题的时候我体力和精神集中度就很低了,导致一直WA在4-- 今天起床后再刷B,终于过了--坑爹. 来看题目: A. Mashmokh and Lights time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Mash…

http://codeforces.com/problemset/problem/552/C C. Vanya and Scales time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Vanya has a scales for weighing loads and weights of masses w0, w1, w2, ..…

http://codeforces.com/problemset/problem/553/A A. Kyoya and Colored Balls time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Kyoya Ootori has a bag with n colored balls that are colored with …

http://codeforces.com/contest/707/problem/D 先说一下离线和在线:在线的意思就是每一个询问单独处理复杂度O(多少多少),离线是指将所有的可能的询问先一次都处理出来,最后对于每个询问O(1)回答. 然后说一下cf的这题: D. Persistent Bookcase time limit per test 2 seconds memory limit per test 512 megabytes input standard input output st…

[CF简单介绍] 提交链接:http://codeforces.com/contest/560/problem/C 题面: C. Gerald's Hexagon time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Gerald got a very curious hexagon for his birthday. The bo…

[cf contest697] D - Puzzles time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Barney lives in country USC (United States of Charzeh). USC has n cities numbered from 1 through n and n - 1 road…

[cf contest246] E - Blood Cousins Return time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Polycarpus got hold of a family tree. The found tree describes the family relations of n people, nu…

[cf contest 893(edu round 33)] F - Subtree Minimum Query time limit per test 6 seconds memory limit per test 512 megabytes input standard input output standard output You are given a rooted tree consisting of n vertices. Each vertex has a number writ…

http://zh.wikipedia.org/wiki/VCard vCard是电子名片的文件格式标准.它一般附加在电子邮件之后,但也可以用于其它场合(如在互联网上相互交换). vCard可包含的信息有:姓名.地址资讯.电话号码.URL,logo,相片等. 历史 vCard(或称做Versitcard)最早是由Versit联盟于1995年提出的,当时联盟成员包括 苹果公司,AT&T科技(后来的朗讯),IBM及西门子. 在1996年十二月,格式的拥有权移至互联网邮件联盟(IMC),此联盟是由一些…

[CF简单介绍] 提交链接:http://codeforces.com/contest/560/problem/B 题面: B. Gerald is into Art time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Gerald bought two very rare paintings at the Sotheby's a…

D. Legacy time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Rick and his co-workers have made a new radioactive formula and a lot of bad guys are after them. So Rick wants to give his legacy…

[CF简单介绍] 提交链接:http://codeforces.com/contest/560/problem/A 题面: A. Currency System in Geraldion time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A magic island Geraldion, where Gerald lives,…

C. Color Stripe time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output A colored stripe is represented by a horizontal row of n square cells, each cell is pained one of k colors. Your task is to…